dma: improve section assignment in i.MX31 IPU DMA driver

The i.MX31 IPU DMA driver is a platform driver, but doesn't need hotplug, so we
can use __init and __exit function attributes.
Signed-off-by: NGuennadi Liakhovetski <lg@denx.de>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

drivers/dma/ipu/ipu_idmac.c

@@ -1576,7 +1576,7 @@ static int __init ipu_idmac_init(struct ipu *ipu)
 	return dma_async_device_register(&idmac->dma);
 }
 
-static void ipu_idmac_exit(struct ipu *ipu)
+static void __exit ipu_idmac_exit(struct ipu *ipu)
 {
 	int i;
 	struct idmac *idmac = &ipu->idmac;
@@ -1595,7 +1595,7 @@ static void ipu_idmac_exit(struct ipu *ipu)
  * IPU common probe / remove
  */
 
-static int ipu_probe(struct platform_device *pdev)
+static int __init ipu_probe(struct platform_device *pdev)
 {
 	struct ipu_platform_data *pdata = pdev->dev.platform_data;
 	struct resource *mem_ipu, *mem_ic;
@@ -1695,7 +1695,7 @@ static int ipu_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int ipu_remove(struct platform_device *pdev)
+static int __exit ipu_remove(struct platform_device *pdev)
 {
 	struct ipu *ipu = platform_get_drvdata(pdev);
 
@@ -1720,7 +1720,7 @@ static struct platform_driver ipu_platform_driver = {
 		.name	= "ipu-core",
 		.owner	= THIS_MODULE,
 	},
-	.remove		= ipu_remove,
+	.remove		= __exit_p(ipu_remove),
 };
 
 static int __init ipu_init(void)

drivers/dma/ipu/ipu_irq.c

@@ -352,7 +352,7 @@ static struct irq_chip ipu_irq_chip = {
 };
 
 /* Install the IRQ handler */
-int ipu_irq_attach_irq(struct ipu *ipu, struct platform_device *dev)
+int __init ipu_irq_attach_irq(struct ipu *ipu, struct platform_device *dev)
 {
 	struct ipu_platform_data *pdata = dev->dev.platform_data;
 	unsigned int irq, irq_base, i;